Tribological properties of FeAl intermetallics under dry sliding
Tribological properties of FeAl intermetallics under dry sliding
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DOI：
10.1016/j.wear.2003.10.012
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发表时间：
2004-07
期刊：
影响因子：
5
通讯作者：
Jun Yang;P. La;Wei-min Liu;Q. Xue
中科院分区：
文献类型：
--
作者：
Jun Yang;P. La;Wei-min Liu;Q. Xue
在OptimolSRV摆动式摩擦磨损试验机上研究了FeAl金属间化合物与AISI52100钢在常温干摩擦条件下的摩擦学性能。研究了载荷和滑动速度对FeAl金属间化合物摩擦学性能的影响。用扫描电子显微镜(SEM)和X射线光电子能谱(XPS)对FeAl金属间化合物的磨损表面进行了分析。结果表明，FeAl金属间化合物的耐磨性优于AISI52100钢。摩擦磨损表面形成了一层粘着的氧化物碎屑层。摩擦层的面积和厚度随滑动速度的变化而变化，但不随载荷的变化而变化。氧化层有助于减少磨损，但增加摩擦。材料的磨损率随着载荷的增加而增加，但随着滑动速度的增加，磨损率先急剧下降后略有下降。材料的摩擦系数在0.45~0.60之间，且不随载荷变化，而是先随滑动速度增大，然后趋于恒定值。随着滑动速度的提高，材料的磨损机制由微断裂向表面疲劳转变。
The tribological properties of FeAl intermetallics under dry sliding against AISI52100 steel at ambient conditions were studied on an Optimol SRV oscillating friction and wear tester in a ball-on-disc contact configuration. Effects of load and sliding speed on tribological properties of the FeAl intermetallics were investigated. The worn surfaces of the FeAl intermetallics were examined with a scanning electron microscopy (SEM) and an X-ray photoelectron spectroscopy (XPS). It was found that the FeAl intermetallics had better wear resistance than the AISI52100 steel. An adhered oxide debris layer was formed on the worn surface in friction. Area and thickness of the friction layer varied with variety of sliding speed but did not vary with load. The oxide layer contributed to decreased wear but increased friction. Wear rate of the material increased with the load, but dramatically decreased at first and then slightly decreased with the sliding speed. The friction coefficient of the material was 0.45–0.60, and did not change with the load, but increased with sliding speed at first, and then tended to be a constant value. Wear mechanism of the material was transformed from microfracture to surface fatigue with increase of sliding speed.